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Related Experiment Videos

Barretts's carcinogenesis.

Ken-Ichi Mukaisho1, Shunpei Kanai1, Ryoji Kushima2

  • 1Division of Molecular and Diagnostic Pathology, Department of Pathology, Shiga University of Medical Science, Otsu, Japan.

Pathology International
|July 11, 2019
PubMed
Summary
This summary is machine-generated.

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Barrett's esophagus, a precancerous lesion, may develop into esophageal adenocarcinoma (EAC). Bile acid reflux and N-nitroso-bile acids in the stomach are implicated in the carcinogenesis pathway, highlighting potential therapeutic targets.

Area of Science:

  • Gastroenterology
  • Oncology
  • Molecular Biology

Background:

  • Barrett's esophagus is a precancerous lesion for esophageal adenocarcinoma (EAC).
  • Long-segment Barrett's esophagus with intestinal metaplasia has higher carcinogenesis rates than short-segment Barrett's esophagus.
  • EAC can develop from cardiac-type mucosa, even without explicit intestinal metaplasia, suggesting plasticity.

Purpose of the Study:

  • To investigate the origins and carcinogenesis pathways of Barrett's epithelium.
  • To clarify the role of duodenal reflux and N-nitroso-bile acids in esophageal carcinogenesis.
  • To address the lack of consensus on defining Barrett's epithelium.

Main Methods:

  • Review of existing research on Barrett's esophagus and EAC.
Keywords:
Barret's esophagusbile acid, gastroesophageal reflux, metaplasia

Related Experiment Videos

  • Analysis of rodent models for insights into epithelial origins.
  • Examination of molecular pathways involved in carcinogenesis, including EGFR and NF-κB.

    • Main Results:

    • The exact origin of Barrett's epithelium (transdifferentiation vs. transcommitment) remains unclear.
    • Duodenal reflux, particularly bile acids, combined with salivary nitrites, forms N-nitroso-bile acids.
    • These compounds can promote inflammation and carcinogenesis via EGFR and NF-κB signaling.

    Conclusions:

    • The pathogenesis of Barrett's esophagus and its progression to EAC involve complex cellular and molecular events.
    • Duodenal reflux and associated chemical modifications play a significant role in driving carcinogenesis.
    • Further research is needed to elucidate the precise cellular origins and to develop targeted therapies.